Return the statistics of geometries for the input geometry.
Since: v0.1.
ST_Analyze_Agg (A: Geometry)
SELECT ST_Analyze_Agg(ST_GeomFromText('MULTIPOINT(1.1 101.1,2.1 102.1,3.1 103.1,4.1 104.1,5.1 105.1,6.1 106.1,7.1 107.1,8.1 108.1,9.1 109.1,10.1 110.1)'));
Return the area of a geometry.
Since: v0.1.
ST_Area (A: Geometry)
SELECT ST_Area(ST_GeomFromWKT('POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))'));
Return the Well-Known Binary representation of a geometry or geography. This function also has the alias ST_AsWKB.
Since: v0.1.
ST_AsBinary (A: Geometry)
SELECT ST_AsBinary(ST_Point(1.0, 2.0));
Return the Well-Known Text string representation of a geometry or geography.
Since: v0.1.
ST_AsText (A: Geometry)
SELECT ST_AsText(ST_Point(1.0, 2.0));
Introduction: Returns Azimuth for two given points in radians null otherwise.
Format: ST_Azimuth(pointA: Point, pointB: Point)
Since: v0.2.
SELECT ST_Azimuth(ST_POINT(0.0, 25.0), ST_POINT(0.0, 0.0));
Returns the closure of the combinatorial boundary of this Geometry.
Format: ST_Boundary(geom: Geometry)
Since: v0.2.
SELECT ST_Boundary(ST_GeomFromWKT('POLYGON((1 1,0 0, -1 1, 1 1))'));
Returns a geometry that represents all points whose distance from the input geometry is less than or equal to a specified distance.
Since: v0.1.
Changed in version v0.2: Support buffer parameters argument
ST_Buffer (A: Geometry, distance: Double)
SELECT ST_Buffer(ST_GeomFromText('POLYGON ((10 10, 11 10, 10 11, 10 10))'), 1.0);
Returns the centroid of geom.
Since: v0.1.
ST_Centroid (A: Geometry)
SELECT ST_AsText(ST_Centroid(ST_GeomFromWKT('POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))')));
Returns the 2-dimensional point on geom1 that is closest to geom2. This is the first point of the shortest line between the geometries. If using 3D geometries, the Z coordinates will be ignored. If you have a 3D Geometry, you may prefer to use ST_3DClosestPoint. It will throw an exception indicates illegal argument if one of the params is an empty geometry.
Format: ST_ClosestPoint(g1: Geometry, g2: Geometry)
Since: v0.2.
SELECT ST_AsText( ST_ClosestPoint( ST_GeogFromText('POINT(-118.4 34.0)'), -- Santa Monica ST_GeogFromText('LINESTRING(-118.5 34.1, -118.3 33.9, -118.2 33.8)') -- LA coastline ) ) As ptwkt;
ST_Collect_Agg is an aggregate function that combines multiple geometries from a set of rows into a single collection.
SELECT ST_Collect_Agg(geom) as collected_points FROM ( SELECT ST_Point(-122.4194, 37.7749) as geom -- San Francisco UNION ALL SELECT ST_Point(-118.2437, 34.0522) -- Los Angeles UNION ALL SELECT ST_Point(-122.6765, 45.5231) -- Portland ) as cities;
Return true if geomA contains geomB.
Since: v0.1.
ST_Contains (A: Geometry, B: Geometry)
SELECT ST_Contains( ST_Point(0.25, 0.25), ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))') ) AS val;
Return the Convex Hull of polygon A
Format: ST_ConvexHull (A: Geometry)
Since: v0.2.
SELECT ST_ConvexHull(ST_GeomFromText('POLYGON((175 150, 20 40, 50 60, 125 100, 175 150))'));
Return true if geomA is covered by geomB.
Since: v0.1.
ST_CoveredBy (A: Geometry, B: Geometry)
SELECT ST_CoveredBy(ST_Point(0.25, 0.25), ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))'));
Return true if geomA covers geomB.
Since: v0.1.
ST_Covers (A: Geometry, B: Geometry)
SELECT ST_Covers(ST_Point(0.25, 0.25), ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))')) AS val;
Introduction: Return true if A crosses B
Format: ST_Crosses (A: Geometry, B: Geometry)
Since: v0.2.
SELECT ST_Crosses(ST_GeomFromWKT('POLYGON((1 1, 4 1, 4 4, 1 4, 1 1))'),ST_GeomFromWKT('POLYGON((2 2, 5 2, 5 5, 2 5, 2 2))'));
ST_CRS returns the Coordinate Reference System (CRS) metadata associated with a geometry or geography object.
SELECT ST_CRS(ST_Point(0.25, 0.25, 4326)) as crs_info;
Computes the difference between geomA and geomB.
Since: v0.1.
ST_Difference (A: Geometry, B: Geometry)
sd.sql(""" SELECT ST_Difference( ST_GeomFromText('POLYGON ((1 1, 11 1, 11 11, 1 11, 1 1))'), ST_GeomFromText('POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))') ) AS val; """).show()
Return the dimension of the geometry.
Since: v0.1.
ST_Dimension (A: Geometry)
SELECT ST_Dimension(ST_GeomFromWKT('POLYGON ((0 0, 1 0, 0 1, 0 0))'));
Return true if geomA is disjoint from geomB.
Since: v0.1.
ST_Disjoint (A: Geometry, B: Geometry)
SELECT ST_Disjoint(ST_Point(0.25, 0.25), ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))')) AS val;
It expands the geometries. If the geometry is simple (Point, Polygon Linestring etc.) it returns the geometry itself, if the geometry is collection or multi it returns record for each of collection components.
Format: ST_Dump(geom: Geometry)
Since: v0.2.
SELECT ST_Dump(ST_GeomFromText('MULTIPOINT ((10 40), (40 30), (20 20), (30 10))'));
Returns true if two geometries are within a specified distance of each other.
Since: v0.1.
ST_DWithin (A: Geometry, B: Geometry, distance: Double)
SELECT ST_DWithin( ST_Point(0.25, 0.25), ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))'), 0.5 );
Returns last point of given linestring.
Format: ST_EndPoint(geom: Geometry)
Since: v0.2.
SELECT ST_EndPoint(ST_GeomFromText('LINESTRING(100 150,50 60, 70 80, 160 170)'));
Returns the bounding box (envelope) of a geometry as a new geometry. The resulting geometry represents the minimum bounding rectangle that encloses the input geometry. Depending on the input, the output can be a Point, LineString, or Polygon.
Since: v0.1.
ST_Envelope (A: Geometry)
SELECT ST_Envelope(ST_Point(1.0, 2.0));
An aggregate function that returns the collective bounding box (envelope) of a set of geometries.
Since: v0.1.
ST_Envelope_Agg (geom: Geometry)
SELECT ST_Envelope_Agg(ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))'))
Return true if geomA equals geomB.
Since: v0.1.
ST_Equals (A: Geometry, B: Geometry)
SELECT ST_Equals( ST_Point(0.25, 0.25), ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))') );
Returns a new geometry with the X and Y coordinates of each vertex swapped. This is useful for correcting geometries that have been created with longitude and latitude in the wrong order.
Since: v0.1.
ST_FlipCoordinates (A: geometry)
SELECT ST_FlipCoordinates( ST_Point(1, 2) );
ST_GeogPoint creates a geography POINT from given longitude and latitude coordinates.
SELECT ST_GeogPoint(10, 10), ST_GeogPoint(0, 0);
Construct a Geography from WKB Binary.
Format: ST_GeogFromWKB (Wkb: Binary)
Since: v0.2.
SELECT ST_GeogFromWKB(decode('010200000002000000000000000084d600c0000000000080b5d6bf00000060e1eff7bf00000080075de5bf', 'hex'));
Construct a Geography from WKT. If SRID is not set, it defaults to 0 (unknown).
Format: ST_GeogFromWKT (Wkt: String)
or
ST_GeogFromWKT (Wkt: String, srid: Integer)
Since: v0.2.
SELECT ST_GeogFromWKT('LINESTRING (1 2, 3 4, 5 6)');
Return the 0-based Nth geometry if the geometry is a GEOMETRYCOLLECTION, (MULTI)POINT, (MULTI)LINESTRING, MULTICURVE or (MULTI)POLYGON. Otherwise, return null
Format: ST_GeometryN(geom: Geometry, n: Integer)
Since: v0.2.
SELECT ST_GeometryN(ST_GeomFromText('MULTIPOINT((1 2), (3 4), (5 6), (8 9))'), 1);
Construct a Geometry from WKB.
Since: v0.1.
ST_GeomFromWKB (Wkb: Binary)
-- Creates a POINT(1 2) geometry from its WKB representation SELECT ST_AsText( ST_GeomFromWKB(decode('0101000000000000000000F03F0000000000000040', 'hex')) );
Construct a Geometry from WKT. This function also has the aliases ST_GeomFromText and ** ST_GeometryFromText**
Since: v0.1.
ST_GeomFromWKT (Wkt: String)
SELECT ST_AsText(ST_GeomFromWKT('POINT (30 10)'));
Return the type of a geometry.
Since: v0.1.
ST_GeometryType (A: Geometry)
SELECT ST_GeometryType(ST_GeomFromWKT('POLYGON ((0 0, 1 0, 0 1, 0 0))'));
Return true if the geometry has a M dimension.
Since: v0.1.
ST_HasM (A: Geometry)
SELECT ST_HasM(ST_GeomFromWKT('POLYGON ((0 0, 1 0, 0 1, 0 0))'));
Return true if the geometry has a Z dimension.
Since: v0.1.
ST_HasZ (A: Geometry)
SELECT ST_HasZ(ST_GeomFromWKT('POLYGON ((0 0, 1 0, 0 1, 0 0))'));
Computes the intersection between geomA and geomB.
Since: v0.1.
ST_Intersection (A: Geometry, B: Geometry)
SELECT ST_Intersection( ST_GeomFromText('POLYGON ((1 1, 11 1, 11 11, 1 11, 1 1))'), ST_GeomFromText('POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))') ) AS val;
An aggregate function that returns the geometric intersection of all geometries in a set.
Since: v0.1.
ST_Intersection_Agg (geom: Geometry)
-- Create a table with overlapping polygons and find their common intersection WITH shapes(geom) AS ( VALUES (ST_GeomFromWKT('POLYGON((0 0, 2 0, 2 2, 0 2, 0 0))')), (ST_GeomFromWKT('POLYGON((1 1, 3 1, 3 3, 1 3, 1 1))')) ) SELECT ST_AsText(ST_Intersection_Agg(geom)) FROM shapes; -- Returns: POLYGON ((1 1, 1 2, 2 2, 2 1, 1 1))
Return true if geomA intersects geomB.
Since: v0.1.
ST_Intersects (A: Geometry, B: Geometry)
SELECT ST_Intersects(ST_Point(0.25, 0.25), ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))')) AS val;
RETURNS true if the LINESTRING start and end point are the same.
Format: ST_IsClosed(geom: Geometry)
Since: v0.2.
SELECT ST_IsClosed(ST_GeomFromText('LINESTRING(0 0, 1 1, 1 0)'));
Returns TRUE if the geometry type of the input is a geometry collection type. Collection types are the following:
GEOMETRYCOLLECTION
MULTI{POINT, POLYGON, LINESTRING}
Format: ST_IsCollection(geom: Geometry)
Since: v0.2.
SELECT ST_IsCollection(ST_GeomFromText('MULTIPOINT(0 0), (6 6)'));
SELECT ST_IsCollection(ST_GeomFromText('POINT(5 5)'));
Return true if the geometry is empty.
Since: v0.1.
ST_IsEmpty (A: Geometry)
SELECT ST_IsEmpty(ST_GeomFromWKT('POLYGON EMPTY'));
RETURN true if LINESTRING is ST_IsClosed and ST_IsSimple.
Format: ST_IsRing(geom: Geometry)
Since: v0.2.
SELECT ST_IsRing(ST_GeomFromText('LINESTRING(0 0, 0 1, 1 1, 1 0, 0 0)'));
Test if geometry's only self-intersections are at boundary points.
Format: ST_IsSimple (A: Geometry)
Since: v0.2.
SELECT ST_IsSimple(ST_GeomFromWKT('POLYGON((1 1, 3 1, 3 3, 1 3, 1 1))'));
ST_IsValid checks whether a geometry meets the rules of a valid spatial object according to the OGC standard.
SELECT ST_IsValid( ST_GeomFromText('POLYGON ((0 0, 2 0, 2 2, 1 1, 0 2, 0 0))') ) AS is_valid;
ST_IsValidReason returns a text explanation describing why a geometry is invalid.
SELECT ST_IsValidReason( ST_GeomFromText('POLYGON((0 0, 2 0, 2 2, 1 1, 0 2, 0 0))') ) AS reason;
Return true if geomA finds k nearest neighbors from geomB.
Since: v0.1.
ST_KNN (A: Geometry, B: Geometry, k: Integer, use_spheroid: Boolean)
SELECT * FROM table1 a JOIN table2 b ON ST_KNN(a.geom, b.geom, 5, false);
Returns the length of geom. This function only supports LineString, MultiLineString, and GeometryCollections containing linear geometries. Use ST_Perimeter for polygons.
Since: v0.1.
ST_Length (A: Geometry)
SELECT ST_Length(ST_GeomFromWKT('LINESTRING(0 0, 10 0)'));
Returns a point interpolated along a line. First argument must be a LINESTRING. Second argument is a Double between 0 and 1 representing fraction of total linestring length the point has to be located.
Format: ST_LineInterpolatePoint (geom: Geometry, fraction: Double)
Since: v0.2.
SELECT ST_LineInterpolatePoint(ST_GeomFromWKT('LINESTRING(25 50, 100 125, 150 190)'), 0.2);
Returns a double between 0 and 1, representing the location of the closest point on the LineString as a fraction of its total length. The first argument must be a LINESTRING, and the second argument is a POINT geometry.
Format: ST_LineLocatePoint(linestring: Geometry, point: Geometry)
Since: v0.2.
SELECT ST_LineLocatePoint( ST_GeogFromText('LINESTRING(0 0, 1 1, 2 2)'), ST_GeogFromText('POINT(0 2)') );
Returns the M (measure) coordinate of a Point geometry. If the geometry does not have an M value, it returns NULL.
Since: v0.1.
ST_M (A: Point)
SELECT ST_M(ST_Point(1.0, 2.0));
Creates a LineString from two or more input Point, MultiPoint, or LineString geometries. The function connects the input geometries in the order they are provided to form a single continuous line.
Since: v0.1.
ST_MakeLine (g1: Geometry or Geography, g2: Geometry or Geography)
Point, MultiPoint, or LineString geometry or geography.Point, MultiPoint, or LineString geometry or geography.SELECT ST_MakeLine(ST_Point(0, 1), ST_Point(2, 3)) as geom;
Given an invalid geometry, create a valid representation of the geometry.
Collapsed geometries are either converted to empty (keepCollapsed=false) or a valid geometry of lower dimension (keepCollapsed=true). Default is keepCollapsed=false.
Format:
ST_MakeValid (A: Geometry) ST_MakeValid (A: Geometry, keepCollapsed: Boolean)
Since: v0.2.
SELECT ST_MakeValid(ST_GeomFromWKT('LINESTRING(1 1, 1 1)'));
Calculates the maximum distance between geomA and geomB.
Since: v0.1.
ST_MaxDistance (A: Geometry, B: Geometry)
SELECT ST_MaxDistance( ST_GeogFromText('POLYGON ((10 10, 11 10, 10 11, 10 10))'), ST_GeogFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))') ) AS val;
The minimum clearance is a metric that quantifies a geometry‘s tolerance to changes in coordinate precision or vertex positions. It represents the maximum distance by which vertices can be adjusted without introducing invalidity to the geometry’s structure. A larger minimum clearance value indicates greater robustness against such perturbations.
For a geometry with a minimum clearance of x, the following conditions hold:
No two distinct vertices are separated by a distance less than x.
No vertex lies within a distance x from any line segment it is not an endpoint of.
For geometries with no definable minimum clearance, such as single Point geometries or MultiPoint geometries where all points occupy the same location, the function returns Double.MAX_VALUE.
Format: ST_MinimumClearance(geometry: Geometry)
Since: v0.2.
SELECT ST_MinimumClearance( ST_GeomFromWKT('POLYGON ((65 18, 62 16, 64.5 16, 62 14, 65 14, 65 18))') );
This function returns a two-point LineString geometry representing the minimum clearance distance of the input geometry. If the input geometry does not have a defined minimum clearance, such as for single Points or coincident MultiPoints, an empty LineString geometry is returned instead.
Format: ST_MinimumClearanceLine(geometry: Geometry)
Since: v0.2.
SELECT ST_MinimumClearanceLine( ST_GeomFromWKT('POLYGON ((65 18, 62 16, 64.5 16, 62 14, 65 14, 65 18))') );
Returns the maximum M (measure) value from a geometry's bounding box.
Since: v0.1.
ST_MMax (A: Geometry)
SELECT ST_MMax(ST_GeomFromWKT('POLYGON ((0 0, 1 0, 0 1, 0 0))'));
Returns the minimum M-coordinate (measure) of a geometry's bounding box.
Since: v0.1.
ST_MMin (A: Geometry)
SELECT ST_MMin(ST_GeomFromWKT('LINESTRING ZM (1 2 3 4, 5 6 7 8)')); -- Returns: 4
Return points of the geometry
Format: ST_NPoints (A: Geometry)
Since: v0.2.
SELECT ST_NPoints(ST_GeomFromText('LINESTRING(77.29 29.07,77.42 29.26,77.27 29.31,77.29 29.07)'));
Returns the number of Geometries. If geometry is a GEOMETRYCOLLECTION (or MULTI*) return the number of geometries, for single geometries will return 1.
Format: ST_NumGeometries (A: Geometry)
Since: v0.2.
SELECT ST_NumGeometries(ST_GeomFromWKT('LINESTRING (-29 -27, -30 -29.7, -45 -33)'));
Return true if A overlaps B
Format: ST_Overlaps (A: Geometry, B: Geometry)
Since: v0.2.
SELECT ST_Overlaps(ST_GeomFromWKT('POLYGON((2.5 2.5, 2.5 4.5, 4.5 4.5, 4.5 2.5, 2.5 2.5))'), ST_GeomFromWKT('POLYGON((4 4, 4 6, 6 6, 6 4, 4 4))'));
This function calculates the 2D perimeter of a given geometry. It supports Polygon, MultiPolygon, and GeometryCollection geometries (as long as the GeometryCollection contains polygonal geometries). For other types, it returns 0. To measure lines, use ST_Length.
To get the perimeter in meters, set use_spheroid to true. This calculates the geodesic perimeter using the WGS84 spheroid. When using use_spheroid, the lenient parameter defaults to true, assuming the geometry uses EPSG:4326. To throw an exception instead, set lenient to false.
Since: v0.1.
ST_Perimeter(geom: Geometry) ST_Perimeter(geom: Geometry, use_spheroid: Boolean) ST_Perimeter(geom: Geometry, use_spheroid: Boolean, lenient: Boolean = True)
SELECT ST_Perimeter(ST_GeomFromWKT('POLYGON((0 0, 10 0, 10 10, 0 10, 0 0))'));
Construct a Point Geometry from X and Y.
Since: v0.1.
ST_Point (x: Double, y: Double)
SELECT ST_AsText(ST_Point(-74.0060, 40.7128));
Constructs a Point with an M (measure) coordinate from X, Y, and M values.
Since: v0.1.
ST_PointM (x: Double, y: Double, m: Double)
SELECT ST_PointM(-64.36, 45.09, 50.0);
Return the Nth point in a single linestring or circular linestring in the geometry. Negative values are counted backwards from the end of the LineString, so that -1 is the last point. Returns NULL if there is no linestring in the geometry.
Format: ST_PointN(geom: Geometry, n: Integer)
Since: v0.2.
SELECT ST_PointN(ST_GeomFromText('LINESTRING(0 0, 1 2, 2 4, 3 6)'), 2);
Returns a MultiPoint geometry consisting of all the coordinates of the input geometry. It preserves duplicate points as well as M and Z coordinates.
Format: ST_Points(geom: Geometry)
Since: v0.2.
SELECT ST_AsText(ST_Points(ST_GeomFromText('LINESTRING (2 4, 3 3, 4 2, 7 3)')));
Constructs a Point with a Z (elevation) coordinate from X, Y, and Z values.
Since: v0.1.
ST_PointZ (x: Double, y: Double, z: Double)
SELECT ST_PointZ(-64.36, 45.09, 100.0);
Constructs a Point with both Z (elevation) and M (measure) coordinates from X, Y, Z, and M values.
Since: v0.1.
ST_PointZM (x: Double, y: Double, z: Double, m: Double)
SELECT ST_PointZM(-64.36, 45.09, 100.0, 50.0);
Generates a GeometryCollection composed of polygons that are formed from the linework of an input GeometryCollection. When the input does not contain any linework that forms a polygon, the function will return an empty GeometryCollection.
Note that ST_Polygonize function assumes that the input geometries form a valid and simple closed linestring that can be turned into a polygon. If the input geometries are not noded or do not form such linestrings, the resulting GeometryCollection may be empty or may not contain the expected polygons.
Format: ST_Polygonize(geom: Geometry)
Since: v0.2.
SELECT ST_AsText(ST_Polygonize(ST_GeomFromText('GEOMETRYCOLLECTION (LINESTRING (2 0, 2 1, 2 2), LINESTRING (2 2, 2 3, 2 4), LINESTRING (0 2, 1 2, 2 2), LINESTRING (2 2, 3 2, 4 2), LINESTRING (0 2, 1 3, 2 4), LINESTRING (2 4, 3 3, 4 2))')));
ST_Polygonize_Agg is an aggregate function that combines a set of linestrings into polygons by finding closed rings formed by the input geometries.
SELECT ST_Polygonize_Agg(geom) AS polygons FROM ( SELECT ST_GeomFromText('LINESTRING(0 0, 0 1)') AS geom UNION ALL SELECT ST_GeomFromText('LINESTRING(0 1, 1 1)') UNION ALL SELECT ST_GeomFromText('LINESTRING(1 1, 1 0)') UNION ALL SELECT ST_GeomFromText('LINESTRING(1 0, 0 0)') ) AS edges;
Return the geometry with vertex order reversed
Format: ST_Reverse (A: Geometry)
Since: v0.2.
SELECT ST_Reverse(ST_GeomFromWKT('LINESTRING(0 0, 1 2, 2 4, 3 6)'));
ST_SetCRS sets or changes the Coordinate Reference System (CRS) identifier of a geometry without transforming its coordinates.
import pyproj crs = pyproj.CRS("EPSG:3857") sd.sql(f""" SELECT ST_SetCRS(ST_GeomFromText('LINESTRING(0 1, 2 3)'), '{crs.to_json()}') as geom; """).show()
This function simplifies the input geometry by applying the Douglas-Peucker algorithm.
Note: The simplification may not preserve topology, potentially producing invalid geometries. Use ST_SimplifyPreserveTopology to retain valid topology after simplification.
Format: ST_Simplify(geom: Geometry, tolerance: Double)
Since: v0.2.
SELECT ST_Simplify(ST_Buffer(ST_GeomFromWKT('POINT (0 2)'), 10), 1);
Simplifies a geometry and ensures that the result is a valid geometry having the same dimension and number of components as the input, and with the components having the same topological relationship.
Since: v0.2.
Format: ST_SimplifyPreserveTopology (A: Geometry, distanceTolerance: Double)
SELECT ST_SimplifyPreserveTopology(ST_GeomFromText('POLYGON((8 25, 28 22, 28 20, 15 11, 33 3, 56 30, 46 33,46 34, 47 44, 35 36, 45 33, 43 19, 29 21, 29 22,35 26, 24 39, 8 25))'), 10);
Snaps the vertices and segments of the input geometry to reference geometry within the specified tolerance distance. The tolerance parameter controls the maximum snap distance.
If the minimum distance between the geometries exceeds the tolerance, the input geometry is returned unmodified. Adjusting the tolerance value allows tuning which vertices should snap to the reference and which remain untouched.
Since: v0.2.
Format: ST_Snap(input: Geometry, reference: Geometry, tolerance: double)
SELECT ST_Snap(poly, line, ST_Distance(poly, line) * 1.01) AS polySnapped FROM ( SELECT ST_GeomFromWKT('POLYGON ((236877.58 -6.61, 236878.29 -8.35, 236879.98 -8.33, 236879.72 -7.63, 236880.35 -6.62, 236877.58 -6.61), (236878.45 -7.01, 236878.43 -7.52, 236879.29 -7.50, 236878.63 -7.22, 236878.76 -6.89, 236878.45 -7.01))') as poly, ST_GeomFromWKT('LINESTRING (236880.53 -8.22, 236881.15 -7.68, 236880.69 -6.81)') as line );
Sets the spatial reference system identifier (SRID) of a geometry. This only changes the metadata; it does not transform the coordinates.
Since: v0.1.
ST_SetSRID (geom: Geometry, srid: Integer)
SELECT ST_SetSRID(ST_GeomFromWKT('POINT (-64.363049 45.091501)'), 4326);
Returns the Spatial Reference System Identifier (SRID) of a geometry. If the geometry does not have an SRID, it returns 0.
Since: v0.1.
ST_SRID (geom: Geometry)
SELECT ST_SRID(polygon)
Returns first point of given linestring.
Format: ST_StartPoint(geom: Geometry)
Since: v0.2.
SELECT ST_StartPoint(ST_GeomFromText('LINESTRING(100 150,50 60, 70 80, 160 170)'));
Computes the symmetric difference between geomA and geomB.
Since: v0.1.
ST_SymDifference (A: Geometry, B: Geometry)
SELECT ST_SymDifference( ST_GeomFromText('POLYGON ((1 1, 11 1, 11 11, 1 11, 1 1))'), ST_GeomFromText('POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))') ) AS val;
Return true if geomA touches geomB.
Since: v0.1.
ST_Touches (A: Geometry, B: Geometry)
SELECT ST_Touches(ST_Point(0.25, 0.25), ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))')) AS val;
Transforms the coordinates of a geometry from a source Coordinate Reference System (CRS) to a target CRS.
If the source CRS is not specified, it will be read from the geometry's metadata. Sedona ensures that coordinates are handled in longitude/latitude order for geographic CRS transformations.
Since: v0.1.
ST_Transform (A: Geometry, TargetCRS: String) ST_Transform (A: Geometry, SourceCRS: String, TargetCRS: String)
-- Transform a WGS84 polygon to UTM zone 49N SELECT ST_Transform(ST_SetSRID(ST_GeomFromWkt('POLYGON((170 50,170 72,-130 72,-130 50,170 50))'), 4326), 'EPSG:32649');
Returns the input geometry with its X, Y and Z coordinates (if present in the geometry) translated by deltaX, deltaY and deltaZ (if specified)
If the geometry is 2D, and a deltaZ parameter is specified, no change is done to the Z coordinate of the geometry and the resultant geometry is also 2D.
If the geometry is empty, no change is done to it. If the given geometry contains sub-geometries (GEOMETRY COLLECTION, MULTI POLYGON/LINE/POINT), all underlying geometries are individually translated.
Format: ST_Translate(geometry: Geometry, deltaX: Double, deltaY: Double, deltaZ: Double)
Since: v0.2.
SELECT ST_Translate(ST_GeomFromText('POINT(-71.01 42.37)'), 1, 2);
This variant of ST_Union operates on a single geometry input. The input geometry can be a simple Geometry type, a MultiGeometry, or a GeometryCollection. The function calculates the geometric union across all components and elements within the provided geometry object.
Format: ST_UnaryUnion(geometry: Geometry)
Since: v0.2.
SELECT ST_UnaryUnion(ST_GeomFromWKT('MULTIPOLYGON(((0 10,0 30,20 30,20 10,0 10)),((10 0,10 20,30 20,30 0,10 0)))'));
Computes the union between geomA and geomB.
Since: v0.1.
ST_Union (A: Geometry, B: Geometry)
SELECT ST_Union( ST_GeomFromText('POLYGON ((1 1, 11 1, 11 11, 1 11, 1 1))'), ST_GeomFromText('POLYGON ((0 0, 10 0, 10 10, 0 10, 0 0))') ) AS val;
An aggregate function that returns the geometric union of all geometries in a set.
Since: v0.1.
ST_Union_Agg (geom: Geometry)
SELECT ST_AsText(ST_Union_Agg(geom)) FROM ( SELECT ST_GeomFromWKT('POLYGON ((0 0, 1 0, 1 1, 0 1, 0 0))') AS geom UNION ALL SELECT ST_GeomFromWKT('POLYGON ((2 2, 3 2, 3 3, 2 3, 2 2))') ) AS shapes;
Return true if geomA is fully contained by geomB.
Since: v0.1.
ST_Within (A: Geometry, B: Geometry)
SELECT ST_Within(ST_Point(0.25, 0.25), ST_GeomFromText('POLYGON ((0 0, 1 0, 0 1, 0 0))')) AS val;
Return the X component of a point geometry or geography.
Since: v0.1.
ST_X(A: Point)
SELECT ST_X(ST_Point(1.0, 2.0));
Returns the maximum X-coordinate of a geometry's bounding box.
Since: v0.1.
ST_XMax (A: Geometry)
SELECT ST_XMax(ST_GeomFromWKT('LINESTRING(1 5, 10 15)')); -- Returns: 10
Returns the minimum X-coordinate of a geometry's bounding box.
Since: v0.1.
ST_XMin (A: Geometry)
SELECT ST_XMin(ST_GeomFromWKT('LINESTRING(1 5, 10 15)')); -- Returns: 1
Return the Y component of a point geometry or geography.
Since: v0.1.
ST_Y(A: Point)
SELECT ST_Y(ST_Point(1.0, 2.0));
Returns the maximum Y-coordinate of a geometry's bounding box.
Since: v0.1.
ST_YMax (A: Geometry)
SELECT ST_YMax(ST_GeomFromWKT('LINESTRING(1 5, 10 15)')); -- Returns: 15
Returns the minimum Y-coordinate of a geometry's bounding box.
Since: v0.1.
ST_YMin (A: Geometry)
SELECT ST_YMin(ST_GeomFromWKT('LINESTRING(1 5, 10 15)')); -- Returns: 5
Return the Z component of a point geometry or geography.
Since: v0.1.
ST_Z(A: Point)
SELECT ST_Z(ST_Point(1.0, 2.0));
Returns the maximum Z-coordinate of a geometry's bounding box.
Since: v0.1.
ST_ZMax (A: Geometry)
SELECT ST_ZMax(ST_GeomFromWKT('LINESTRING ZM (1 2 3 4, 5 6 7 8)')); -- Returns: 7.0
Returns the minimum Z-coordinate of a geometry's bounding box.
Since: v0.1.
ST_ZMin (A: Geometry)
SELECT ST_ZMin(ST_GeomFromWKT('LINESTRING ZM (1 2 3 4, 5 6 7 8)')); -- Returns: 3
Returns a code indicating the Z and M coordinate dimensions present in the input geometry.
Values are: 0 = 2D, 1 = 3D-M, 2 = 3D-Z, 3 = 4D.
Format: ST_Zmflag(geom: Geometry)
Since: v0.2.
SELECT ST_Zmflag( ST_GeomFromWKT('LINESTRING Z(1 2 3, 4 5 6)') );